Radiator construction



Patented eb. 28, 1 933 1 UNITED 'STATES- PATENT OFFICE WALTER LaMAOK, F TOLEDO, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO AIR- WA'Y ELECTRIC APPLIANCE CORPORATION, OF TOLEDO, OHIO, A CORPORATION OF DELAWARE RADIATOR CONSTRUCTION Application filed October 16, 1929'. Serial No. 400,021.

The present invention relates to the construction of radiators, particularly radiators.

is also an object of the invention to obtain such a device which will utilize material of high heat conductivity, and which will at the same time be free from porosity and blow holes and any tendency to leak.

While one of the chief applications of the invention may be in connection with steam heating-radiators, it may also be employed with hot water radiators or with any heating medium or in any situation where it is desired to transmit heat to the surrounding air or other gas from a heating medium occupying the interior of the radiator. The device is also adapted to be used for cooling air in which case the interior of the radiator may be filled with a refrigerant such as ammonia or sulphur dioxide.

In general the invention is .adaptable for use in any environment where the surrounding air or gas is to be either heated or cooled, in other words, for use anywhere that heat is to be transmitted through the radiator, either inwardly or outwardly.

In order to more clearly explain the invention, reference is made to the following description of different embodiments thereof 35 taken in connection with accompanying drawings in which Fig. 1 is a side elevation partly in section of a heating deviceemploying a radiator of improved construction;

Fig. 2 is a sectional plan of the radiator shown in Fig. l;

Fig.3 is a side elevation of one of the radiator units partly broken away to show the interior construction;

Fig. 4-. is a horizontal section of one of the radiator units taken on the line 4-4 of Fig.3;

Fig. 5 is an enlarged sectional view of the small end of the duct shown in Fig. 4;

Fig. 6 is an enlarged sectional View of the cross bracing shown in Fig. 4; v

Fig. 7 is a top perspective view of the inner duct or lining showing an inlet pipe bushing in place; I

Fig. 8 is a front elevation partly in section of another form of radiator construction;

Fig. 9 is a section taken on the line 99 of Fig. 8, and

Fig. 10 is a section similar to Fig. 4 of still another form of radiator unit.

Referring to the drawingsmore in detail, 11 represents an enclosing box in which there may be positioned a radiator having a plurality of units 12, 13, 14 and 15. At the front of the box there are shown a plurality of ad- I justable louvers 16, which control the amount and direction of the air being discharged through the radiator. At the rear of the radiator is shown a blower or fan 17 for positively circulating air over the surface of the radiator. Each radiating unit may be supplied with steam or other heating medium through an orifice 18 connected with a supply pipe 19.

These supply pipes are connected by a heador, which in turn is supplied from a main steam pipe 21. g

In a similar manner orifices 22 for the outflow of the condensed steam are connected with discharge pipes 23, which are connected with a discharge header 24, the discharge header connecting with a main discharge pipe 25. A suitable motor 26 for driving the fan 17 may have supporting pipes or tubing 27 and 28, which are connected by means of pipe fittings 29 and 30 to the inlet and discharge steam pipes 21 and 25.

Each heating unit is preferably provided with a duct 29 for the steam or other heatin medium, and is surrounded with a pluraIity of fins 30 extending substantially at right angles to the wall of the duct 29. As

the combined heating and circulating of the air.

The duct or compartment 29 may preferably have an inner lining of sheet metal, such as stainless steel. Side walls 31 may be formed first, one way as shown .in Fig. 5, being to bend a sheet of such material in the form of a tapered duct of relatively small width and welding the joined edges as indicated at 32. Another way of forming this portion of the lining is to bend the tube having the correct perimeter into the desired shape without using the longitudinal weld 32. The end openings of the compartment 29 may be closed by end plates 33, which have secured therein bushings 34 which may be threaded as at 35 for the inlet and outlet pipes 19 and 23. The bushings 34 may be secured to the end plates by welding as indicated at 35, and by similar welding 36, the end dates may be secured to the side walls 31. t is also desirable to provide cross braces 37. One way of forming such cross braces is to punch indentations 38 in the side walls 31, grind off the tops 39 of the indentations or otherwise true them up, and finally drive a tightly fitting sleeve 40 into the alined openings (Fig. 6). This sleeve 40 may-if desired be welded in place as indicated at 40.

The whole compartment formed of sheet metal, which is to be the lining of the completed radiator unit, together with the bushings 34, is then used as a core of a cast metal mold, and an enclosing shell 11 of suitable material is cast around the lining. A plurality of parallel fins 30 extending substantially perpendicularly to the wall 31 of" the lining are preferably cast integral with the shell 41, and provide greatly increased radiating surface. The outer shell 41 is preferably of a high heat conductivity. It is also desirable that this outer shell be of a character that is not brittle, but will permit a considerable amount of deformation without breaking. Among the materials which meet the foregoing requirements may be mentioned, for example an alloy comprising 87% aluminum and 13% silicon. During the operationof pouring. the foregoing alloy may be modified by the addition of a small amount of metallic sodium.

The form of radiator shown in Fig. 8 com prises a pipe or tube 46 of sheet metal, such as stainless steel. to each end of which there may be welded. or otherwise suitably secured a tapped bushing 47 for connection with inlet and exhaust pipes. The tubing 46 with the end bushings 47 is used as a core of the mold, and an enclosing shell 48 is cast around the core so that the tubing becomes a lining embedded in the surrounding material. The outer shell preferably has formed integral and-extending outwardly in a direction substantially perpendicular to the walls of the tubing a plurality of radiating fins 19. The

inner lining renders the construction strong- .structed as in Fig. 4 with an inner. lining 52 of sheet metal embedded in the outer shell 53, which is cast around the lining 52 as a core, and which is provided with a plurality of fins v5 1. The incoming air first passes through a broad passage as indicated at the arrow A and then through a narrower passage as indicated at the arrows l5, and finally is discharged where the passage is again broad as at the arrow C. l/Vhile not necessarily confined thereto, the conformation just described is adapted for use where the air is being cooled by a refrigerating medium within the radiator, and is particularly suitable for such a radiator which is used sometimes for heating and sometimes for cooling.

It is to be understood that the hereinbee fore described embodiments of invention are for the purpose of illustration only, and not by way of limitation as various changes may be made therein without departing from the sphere and scope of the invention as defined in the sub-joined claims.

I claim:

1. A radiator comprising an inner duct of sheet metal having a stream line contour and an enclosing casing of cast metal, said casing having radiating fins extending sub- 4 said compartment and having integral fins.

extending in a direction substantially perpendicular to the walls of said compartment.

3. A radiator comprising a stream lined inner duct of sheet metal and anenclosing shell of cast metal, said enclosing shell having fins disposed substantially perpendicularly to the wall of said inner duct in order to greatly strengthen the pressure resistance of the inner duct by forming outside stays holding the inner duct to its original form when a pressure is exerted inside the inner duct.

4. A radiator comprising a relatively wide and flat inner duct of sheet metal and an enclosing shell of cast metal having radiating fins disposed substantially at right angles to the axis of said duct, said fins extending entirely around said duct, and being wider at the sides of the duct than across the edges thereof. .7

5. A radiator comprising a relativel wide and flat inner duct of sheet metal inc uding opposed side walls provided with registering inwardly punched indentations, and an enclosing shell of cast metal including integraL' 1y cast radiating fins and integrally cast bridge lugs flowed through said registering indentations. a

6. A radiator comprising a relativel wide and flat inner duct of sheet metal ormed with two longitudinal edges welded together to form a seam at the longitudinal edge of the duct and anenclosing shell of cast metal including integral fins, said shell including a longitudinal bead enclosing said seam.

7. A radiator comprising an inner duct of sheet metal having side walls and end walls welded thereto, a threaded bushing welded into an end wall, and a shell of cast metal enclosing said side walls, said end walls and Eaid bushing, said shell including integral ns. r

8. A radiator comprising a relativel wide and flat inner duct of sheet metal inc uding side walls, lugs bridging the space between said side walls to resist collapsing thereof and an enclosing shell of cast metal including integral fins positioned to brace the side walls against expansive pressures from within the not.

Signed by me this 14th da of October, 1929.

WALTER L. MACK. 

